Default value for Listbox (Tkinter)

[Harlin Seritt]

Whenever I set up something similar:

vals = ['1', '2','3']
for v in vals:
listbox.inset(END, v)

I notice that when this listbox is displayed, there is never a default
value. How can I make sure that one of the indices is selected by
default?

Thanks,

Harlin

 

[=?ISO-8859-1?Q?J=F8rgen_Cederberg?=]

Whenever I set up something similar:

vals = ['1', '2','3']
for v in vals:
listbox.inset(END, v)

I notice that when this listbox is displayed, there is never a default
value. How can I make sure that one of the indices is selected by
default?

Hi Harlin,

you must use the select_set method of the listbox.

---
from Tkinter import *

root = Tk()
listbox = Listbox(root)
listbox.pack()

vals = ['1', '2','3']
for v in vals:
listbox.insert(END, v)

listbox.select_set(0) # sets the first element

root.mainloop()
---

Some good resources for Tkinter:
http://www.pythonware.com/library/tkinter/introduction/index.htm
http://infohost.nmt.edu/tcc/help/pubs/tkinter/

HTH
Jørgen Cederberg

 

[Harlin Seritt]

Thanks Jorgen!

I was reading the Tkinter tutorial (I was looking at this particular
page:
http://www.pythonware.com/library/tkinter/introduction/x5513-methods.htm)
and saw this for select_set():


select_set(index), select_set(first, last)
Add one or more items to the selection.


I think this was why I overlooked it. The description for it says the
listbox adds one or more items to a selection. I would think the
description should say the listbox sets the index or element.

Thanks again,

Harlin